In addition to providing standard common dialog boxes, the CommonDialog control enables you to display a Help file. To display a Help file, you can use the HelpFile, HelpContext, and HelpCommand properties to set a file name and context. After you set the properties, use the ShowHelp method to open the file. If you do not specify a valid file name and context, the main Windows CE Help file is used by default.
The following code example shows how to display a Help file.
Public Function DisplayHelp()
'Set the Help file and context
CommonDialog1.HelpFile = "calc.htp"
CommonDialog1.HelpContext = "use_the_paper_tape"
'Set the control to use the context
CommonDialog1.HelpCommand = cdlHelpContext
'Show the Help
CommonDialog1.ShowHelp
End Function